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Home >> Mercury >> 2008 >> Milan Base, 3.0 1, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1784 (Climate Control System - General Information & Diagnostics (Except Hybrid)) >> Diagnosis And Testing >> Principles of Operation >> Pinpoint Tests >> Pinpoint Test F: DTCs B1A63:11 and 15 or DTCs B1A64:11 and 15 >> PINPOINT TEST F: DTCs B1A63:11 AND 15 OR DTCs B1A64:11 AND 15

PINPOINT TEST F: DTCs B1A63:11 AND 15 OR DTCs B1A64:11 AND 15

WARNING: This page is about a different car, the 2011 Mercury Milan, 2011 Lincoln MKZ, and 2011 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
  1. F1 CHECK THE SUNLOAD SENSOR REFERENCE VOLTAGE 
    • Ignition OFF.
    • Disconnect: Sunload Sensor C286.
    • Ignition ON.
    • Press the AUTO button.
    • Measure the voltage between sunload sensor C266-4, circuit GD116 (BK/VT), harness side and sunload sensor:
      • For DTC B1A63  , C286-1, circuit VH417 (YE/OG), harness side.
      • For DTC B1A64  , C286-3, circuit VH416 (VT/GY), harness side.
      Fig 1: Checking Sunload Sensor Reference Voltage
      G07787129Courtesy of FORD MOTOR CO.
    • Is the voltage between 4.7 and 5.1 volts? 
    • Yes  : INSTALL a new sunload sensor. CLEAR the DTCs. REPEAT the self-test. If the code returns, GO to  F6.
    • No  : If diagnosing DTC B1A63:15  or DTC B1A64:15  , GO to F2.

      If diagnosing DTC B1A63:11  or DTC B1A64:11  , GO to  F5.

  2. F2 CHECK CIRCUIT VH416 (VT/GY) AND VH417 (YE/OG) FOR A SHORT TO VOLTAGE 
    • Ignition OFF.
    • Disconnect: HVAC Module - Dual Automatic Temperature Control (DATC) C2356a.
    • Disconnect: HVAC Module - DATC C2356b.
    • Ignition ON.
    • Measure the voltage between ground and sunload sensor:
      • For DTC B1A64:11  , C286-3, circuit VH416 (VT/GY), harness side.
      • For DTC B1A63:11  , C286-1, circuit VH417 (YE/OG), harness side.
      Fig 2: Checking Circuit VH416 (VT/GY) And VH417 (YE/OG) For Short To Voltage
      G07787130Courtesy of FORD MOTOR CO.
    • Is any voltage present? 
    • Yes  : REPAIR circuit VH416 (VT/GY) or VH417 (YE/OG) for a short to voltage. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
    • No  : GO to F3.
  3. F3 CHECK CIRCUIT GD116 (BK/VT) FOR AN OPEN 
    • Ignition OFF.
    • Measure the resistance between ground and sunload sensor C286-4, circuit GD116 (BK/VT), harness side.
      Fig 3: Measuring Resistance Between Ground And Sunload Sensor C286-4, Circuit GD116 (BK/VT)
      G07787131Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes  : GO to F4.
    • No  : REPAIR circuit GD116 (BK/VT) for an open. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  4. F4 CHECK CIRCUITS VH417 (YE/OG) AND VH416 (VT/GY) FOR AN OPEN 
    • Measure the resistance between HVAC module - DATC C2356b-6, circuit VH416 (VT/GY), harness side and sunload sensor C286-3, circuit VH416 (VT/GY), harness side.
      Fig 4: Measuring Resistance Between HVAC Module - DATC C2356B-6 And Sunload Sensor C286-3, Circuit VH416 (VT/GY)
      G07787132Courtesy of FORD MOTOR CO.
    • Measure the resistance between HVAC module - DATC C2356b-3, circuit VH417 (YE/OG), harness side and sunload sensor C286-1, circuit VH417 (YE/OG), harness side.
      Fig 5: Measuring Resistance Between HVAC Module - DATC C2356B-3 And Sunload Sensor C286-1, Circuit VH417 (YE/OG)
      G07787133Courtesy of FORD MOTOR CO.
    • Is the resistance less than 5 ohms? 
    • Yes  : GO to  F6.
    • No  : REPAIR circuit VH416 (VT/GY) or circuit VH417 (YE/OG) for an open. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
  5. F5 CHECK CIRCUIT VH417 (YE/OG) OR CIRCUIT VH416 (VT/GY) FOR A SHORT TO GROUND 
    • Ignition OFF.
    • Disconnect: HVAC Module - DATC C2356a.
    • Disconnect: HVAC Module - DATC C2356b.
    • Measure the resistance between ground and sunload sensor:
      • For DTC B1A64:11  , C286-3, circuit VH416 (VT/GY), harness side.
      • For DTC B1A63:11  , C286-1, circuit VH417 (YE/OG), harness side.
      Fig 6: Checking Circuit VH417 (YE/OG) Or Circuit VH416 (VT/GY) For Short To Ground
      G07787134Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    • Yes  : GO to F6.
    • No  : REPAIR circuits VH417 (YE/OG) or VH416 (VT/GY) for a short to circuit RH111 (GY/BU). CLEAR the DTCs.

      REPEAT the self-test. TEST the system for normal operation.

  6. F6 CHECK THE MODULE CONNECTION 
    • Inspect the module connectors for:
      • corrosion.
      • pushed-out terminals.
      • damaged terminals.
    • Connect and correctly seat all the HVAC module connectors.
    • Clear the DTCs.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
    • Yes  : INSTALL a new HVAC module. REFER to CLIMATE CONTROL -- FUSION, MILAN & MKZ article. TEST the system for normal operation.
    • No  : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
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